In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bonding: do not clear curr_active_slave prematurely when releasing all slaves<\/p>\n
When releasing all slaves during bond destruction (all == true),
\n__bond_release_one() unconditionally clears bond->curr_active_slave to
\nNULL in every iteration.<\/p>\n
If a backup slave is released before the active slave,
\nbond_alb_deinit_slave() triggers rlb_teach_disabled_mac_on_primary(),
\nwhich increments the active slave dev promiscuity counter and sets
\nbond_info->primary_is_promisc = 1.<\/p>\n
Because bond->curr_active_slave was prematurely cleared to NULL when
\nreleasing the backup slave, the subsequent iteration releasing the active
\nslave evaluates oldcurrent as NULL, so bond_change_active_slave(bond, NULL)
\nis skipped. Consequently, bond_alb_handle_active_change() is never called
\nto decrement the promiscuity counter, permanently leaking promiscuous
\nmode on the physical device after bond teardown.<\/p>\n
When oldcurrent == slave, bond_change_active_slave(bond, NULL) already sets
\nbond->curr_active_slave to NULL. We only need to avoid selecting a new
\nactive slave when all == true. Replace the if (all) branch with
\nif (!all && oldcurrent == slave).<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bonding: do not clear curr_active_slave prematurely when releasing all slaves<\/p>\n
When releasing all slaves during bond destruction (a<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29229","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}